Graphophone.



T. H. MAODONALD.

GRAPHOPHONE.

APPLICATION FILED APR.Z7,1907.

Patented Oct. 12, 1909.

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T. H. MACDONALD.

GRAPHOPHONE.

APPLICATION BI LED APR. 27, 1907. 936,646. Patented 001 .123909."

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T. H. MACDONALD. GRAPHOPHONE. APPLICATION FILED APR. 27, 1907. 936,646.

I ooNAunof Bridgeport, Connecticut, have inandhas for its object toprovide a machine the sound-box .ing a mandrel 12.

' driven by bel't'1-6 extending from the motor.

broken away; Fig.

THOMAS H. maonormfin/ or BR'IDGEPQRT,

OFFICE.

CONNECTICUT, ASSIGNOR TO AMERICAN GRAPHOPHONE COMPANY, OF BRIDGEPOR'I",CONNECTICUT, A CORPORATION OF WEST VIRGINIA.

Specification of Letters Patent.

GRAPHOPHONE.

Patented 0ct.12, race.

Application filed April 27, 1907. Serial No. 370,563.

To all' whom itmay concern:

"Be it known that I, THOMAS H. MAC- vented anew and useful Improvementin Gra v hophones, which improvement is fully set. fdrth in thefollowing specification.

This invention -relates to graphophone'a' of this charactelizwhichShit-11y be simple in construction,

with a directconnection from into the amplifying horn used in suchmachines, withou any loose joints between the sound box an thehorni; toroe vide a rigid horn support, and general y a more compactconstruction. in that formfof machine which employs a cylindricalrecord, With these objects. i-Ir-view, the inventionconsi'sts of thearrangement and-combination of elements'hereinafter described and thenpointed out in the claims.

One mechanical'expression of theinvcntive idea is, for the purpose ofillustration, shown in t e accompanying drawings, in whichr Figure 1 isa top plan view with parts line 2-2,'Fig. 1; gitudinal section.

Referring to the drawings, 1 is a. suitable frame provided with avertical upright-,3,

and provided with a suitable track or race way such as theledges 4,4. Acarriage 5, preferably provided with wheels 6, 6, rests upon this trackor racewasaid carriage having at one end a vertica upright 7. with anoutwardly projecting and preferably hollow bracket p1'ece8, The upright7 and the bracket piece 8 are provided with bearings 9 and 10respectively, within which is mounted to turn, a hollow mandrel shaft'llsu port- Thismandrel s a t'has,' on diametrically opposite sides of itsinterior, splinerooves13,1' 3*.

Turning in earings in the upright 3518a shaft. 14 having on its exteriorend pulley 15 and Fig. 3 is a central lon- On the opposite end of'theshaftl i is a. pin 17 whose outwardly projecting ends extend into thespline-grooves1'3 on. the interior of the mandrelv shaft 11 with which;the propek lingshaftlisarraugedtotelescope; Beneath the mandrel,propelling screw; 18 is. mounted in the carriage 5, with one end}.projecting through the bearing in the c rriage, and: a; 1

-. End] is in position to lever- 29 is lifted, stood. 2 is across-section on the entinstance is.

more ,whereit joins the soundan. opening registering wi or openingsound-box.

" with a; stylus ;to. the frame which is connected .to

. train of gears 19,20 and 21 connect the mandrel shaft 11 with Pivotedto the bearing a nut 24 in engagement the propelling screw 18.

frame 1 at 22 is a lever 23 which nut is-nornially held withthepropelling screw 18 by'the spring-25 secured at one end to thelever'23-and at the other end to the frame of the machine,'as shown.Rigidly secured to and preferably integralwith the lever 23 is anupward-1y project ng arm 26,, whose upper of bell-crank-lever 27,pivoted; to the frame wipe against one armof the machine at 28, theother arm of the lever 27 7 being in position tolift the reprod'ucer, soas to throw the style out of engage- ;ment with the record when thelever 23 is operated against the tension of the spring ;25', by whichoperation the nut 24 is disengaged from'the propelling screw. As aconvenient means for thus actuating the lever 23, a lever. 29 is"pivotedto the frame at 30 with i 23 when the outwardly projecting end of the aswill be readily underv one arm in position to engage the lever Rigid-1ysecured to the frame 1 is the sound boir 31 with the This connection inthe pres-.-

amplifying horn 32' secured directly upon the back thereof, prefjerablyso as to swing around, tothe end I that the horn may thesound- 1 box 31within which the flanged end 33 of the horn snugly bozawith itsinneredge projecting over the flange33 of the horn, as clearly shown inFig. 2. For the purpose of'avoiding unnecessary friction, the end of thehorn, or properly speaking, the elbow thereof, has an annular recess 35formed therein.

The interior of the horn adjacent to the part conical, with its smallestpoint provided with tlra suitable hole 36 in the top or back of the Thesound-box is provided with the usual or any suitable diaphragm 3 7', andbar or lever 38 pivoted at 39 and carrying a st lus lever 40 thed-iapiragnr, as by asuitable thread or other connection; The stylus bar orlever- 38 is normally held 'de box is tapered or pressed by the actionof a spring etl, the outer end of said lever being in the path of theupward movement of the bell-crank-lever a previous application of mine,and need not, therefore, be further herein described in detail.

Operation: As shown in the drawings, the

parts are in the position which theyoccupy on the machine and engagingsaid screw, ,a

at 'tlu' time when the reproduction, of a record has begun, the nut. 24being in engagement with the propelling screw 18, and the reproducingstylus being in engagement with the record. \Vhen power is applied tothe shaft 14 it revolves the mandrel 12 by reason of the engagement ofthe pin '17 and the splines 13 of the hollow, mandrel shaft 11; and byreason of the chain'of gearings 19, 20"and 21 the propelling screw '18i.s-re.-

volved; and by reason of the engagement of this screw with the nut 24:the carriage 5 is propelled along theways 4, l the shaft 14:

telescoping with the mandrel shaft 11 during this movement. WVhen-it isdesired to stop the machine, the lever 29 is raised, thereby disengagingthe nut from --the propelling screw and causing the lever 27 to elevatethe 1 stylus to disengage it from the record.

It will be observed that there is thus provided a-very compactconstruction, with-a rigid horn support, which horn has directconnection with the sound-box, without any movable or loose jointsbetween the horn and the sound-box which would interfere to a greater orless extent withthe correct transbox to the-amplifying horn.

What -I clainiis": v i

1. In a graphophone, the combination of a carriagegla mandrel shaft and'operating screw mounted to revolve therein a recordcarrying mandrelonsaid shaft, a-nutfixed l l l power shaft operatively connected to saidmandrel shaft and operating screw, a soundbox'fixedly mounted withrelation to the mandrel, and an amplifying horn directly mounted on thesound-box.

2. In a graphophone, a frame, a track or way on said frame, a carriagemovable on said way, a revoluble mandrel and an operating screw mountedto turn on said carriage, a power shaft having bearing on said frame andoperatively connected to said mandrel, a train of gearlngbetwcen saidmandrel-and screw, a nut on the frame engaging said screw, a sound-boxfixed to the frame, and

an amplifying horn mounted directly on s id sound-box.

3. In a graphophone, the combination of a fixedly mounted sound-box, ahollow mandrel, a hollow mandrel shaft supporting the same, a bearingfor said shaft projecting into said inandrel' a powershaft telescopingwith and splmedto saidmandrel shaft, an

perating screw and nut one of which is fixed and the other of whichmoves longitudinally with the mandrel, and operative connections betweenthe power shaft and the one of these elements which moves longitudinallywith the mandrel.

4. In a graphophone, the combination of a fixedly mounted sound-box, acarriage, a

f revoluble inandrel and an operating screw mission of the sound wavesfrom the soundspecification in the presence bf'two subscribon saidcarriage,.a lever, pivoted to the inachine frame and bearing a nutengaging said screw, a record on the mandrel, a stylus on the sound-boxengaging the record, and

means operated by said lever when it is moved to disengage the nut fromthe screw,

which means lifts the stylus from the record. In testimony whereof Ihave signed this ,IV itnesses A. Gnmnn, B. NICHOLSON.

